Just be who you are...
Whoever you are at heart. Whoever you want to be.
If you want to reinvent yourself because you're not happy with the way your are then go ahead and do it until you are happy! But remember, no one is more beautiful than you, being yourself, because that's something no one can ever take away from you. (a little harder if you're an identical twin soz) But seriously being you makes you unique and gives you an advantage many people don't have.
People these days are too occupied with "listening to the right music", or "wearing the right clothes" trying to be "indie" or what not.
Tiny side rant: Being "indie" means being an individual. If you're all wearing the same goddamn thing YOU'RE NOT INDIE. So please take off your flower hairbands and choker necklaces if you're claiming to be indie. If you like the style: fine, just don't called yourself indie or hipster if you do. Tiny side rant over.
Sometimes you may not like being yourself. You can change and still stay true to yourself, but never be anyone else. Don't do something purely because it is expected of you or is the normal thing to do. Do what makes you feel good. Whether that's wearing tight dresses, baggy T-Shirts, listening to Bring Me The Horizon or One Direction. If it's you, it's right.
Keep it real. RealRocks.